Add method to GrProgramResource to record that pending a execution was completed.

src/gpu/GrProgramResource.cpp

Index: src/gpu/GrProgramResource.cpp
diff --git a/src/gpu/GrProgramResource.cpp b/src/gpu/GrProgramResource.cpp
index 08975ae041dd7a51cd6675ca19a7e85fc071a3f3..3bf25a1137a4bcbad53d935b3c651ebd9ca0b5f2 100644
--- a/src/gpu/GrProgramResource.cpp
+++ b/src/gpu/GrProgramResource.cpp
@@ -74,7 +74,7 @@ void GrProgramResource::setResource(GrGpuResource* resource, IOType ioType) {
 }
 
 void GrProgramResource::markPendingIO() const {
-    // This should only be called once, when the owning GrProgramElement gets its first
+    // This should only be called when the owning GrProgramElement gets its first
     // pendingExecution ref.
     SkASSERT(!fPendingIO);
     SkASSERT(NULL != fResource);
@@ -97,6 +97,30 @@ void GrProgramResource::markPendingIO() const {
     }
 }
 
+void GrProgramResource::pendingIOComplete() const {
+    // This should only be called when the owner's pending executions have ocurred but it is still
+    // reffed.
+    SkASSERT(fOwnRef);
+    SkASSERT(fPendingIO);
+    switch (fIOType) {
+        case kNone_IOType:
+            SkFAIL("GrProgramResource with neither reads nor writes?");
+            break;
+        case kRead_IOType:
+            fResource->completedRead();
+            break;
+        case kWrite_IOType:
+            fResource->completedWrite();
+            break;
+        case kRW_IOType:
+            fResource->completedRead();
+            fResource->completedWrite();
+            break;
+
+    }
+    fPendingIO = false;
+}
+
 void GrProgramResource::removeRef() const {
     // This should only be called once, when the owners last ref goes away and
     // there is a pending execution.